An outgrowth of informal picking sessions, the Cache Valley Drifters continue to bring a modern outlook to bluegrass and country music. Although they disbanded for more than a decade, between 1979 and 1992, the group has been steadily making up for lost time. Their performances are as likely to include bluegrass-ized interpretations of songs by Paul Simon, Leon Russell, and Cream as they are to feature tunes by the late country folksinger Kate Wolf or traditional hill country material. The Cache Valley Drifters' association with Wolf is natural considering that the band's long...